Hi Linda,
You didn't do anything wrong.  Right now there are no links as part of the ecard.  Certainly a good idea.  We just haven't focused our attention to the ecard side of our operation as we have a long list of to do's on the paper card side.
 
If a quick fix, I'll see if the team can make the "Image by:" credits link to your store.  Otherwise I'll add it to our wish list.
 
Thank you for your question/suggestion.
Mindy